— I didn’t know you were friends with Mr. Smith. — We ______ each other for6 years.
It's very difficult, _______ I can do it myself.
—Is it _____in winter in Harbin ______in Nanjing?—Yes, it’s much colder.
-_______do you learn English? -I learn English every day.
sister is an English teacher.
Miss Li is a teacher, Meimei is______________student.